<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>192-new的使用.html</title>
</head>
<body>
	
</body>
<script>
	function show(){
		console.log(this);
	}
	// window.show();
	var obj = new show();
	console.log(obj);
</script>
</html>